Enable host1x and add the rgb output.
Also add the power sequence that controls the backlight and panel. The
sequence strictly follows the order and timings of the panel
specification.
Currently the backlight device controls both backlight and panel, this
needs to be fixed once the panel framework supports power sequences.
Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
---
arch/arm/boot/dts/tegra20-ventana.dts | 108 +++++++++++++++++++++++++++++++++-
1 file changed, 105 insertions(+), 3 deletions(-)
diff --git a/arch/arm/boot/dts/tegra20-ventana.dts b/arch/arm/boot/dts/tegra20-ventana.dts
index adc4754..31c9c5c 100644
--- a/arch/arm/boot/dts/tegra20-ventana.dts
+++ b/arch/arm/boot/dts/tegra20-ventana.dts
@@ -10,6 +10,15 @@
reg = <0x00000000 0x40000000>;
};
+ host1x {
+ dc@54200000 {
+ rgb {
+ status = "okay";
+ nvidia,ddc-i2c-bus = <&lcd_ddc>;
+ };
+ };
+ };
+
pinmux {
pinctrl-names = "default";
pinctrl-0 = <&state_default>;
@@ -341,7 +350,7 @@
#size-cells = <0>;
};
- i2c@1 {
+ lcd_ddc: i2c@1 {
reg = <1>;
#address-cells = <1>;
#size-cells = <0>;
@@ -516,6 +525,99 @@
bus-width = <8>;
};
+ backlight: backlight {
+ compatible = "pwm-backlight";
+ brightness-levels = <0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 255>;
+ default-brightness-level = <12>;
+
+ /* resources used by the power sequences */
+ pwms = <&pwm 2 5000000>;
+ pwm-names = "backlight";
+ power-supply = <&vdd_bl_reg>;
+ panel-supply = <&vdd_panel_reg>;
+
+ power-sequences {
+ power-on {
+ /*
+ * Panel power and LVDS enable.
+ * TODO: move into the panel device as soon as
+ * panel framework supports power sequences.
+ */
+ step0 {
+ type = "regulator";
+ id = "panel";
+ enable;
+ };
+ step1 {
+ type = "gpio";
+ gpio = <&gpio 10 0>;
+ value = <1>;
+ };
+ step2 {
+ type = "delay";
+ delay = <200000>;
+ };
+ /* Backlight sequence. This belongs here. */
+ step3 {
+ type = "regulator";
+ id = "power";
+ enable;
+ };
+ step4 {
+ type = "delay";
+ delay = <10000>;
+ };
+ step5 {
+ type = "pwm";
+ id = "backlight";
+ enable;
+ };
+ step6 {
+ type = "gpio";
+ gpio = <&gpio 28 0>;
+ value = <1>;
+ };
+ };
+
+ power-off {
+ step0 {
+ type = "gpio";
+ gpio = <&gpio 28 0>;
+ value = <0>;
+ };
+ step1 {
+ type = "pwm";
+ id = "backlight";
+ disable;
+ };
+ step2 {
+ type = "delay";
+ delay = <10000>;
+ };
+ step3 {
+ type = "regulator";
+ id = "power";
+ disable;
+ };
+ /* This also belongs to the panel sequence */
+ step4 {
+ type = "delay";
+ delay = <200000>;
+ };
+ step5 {
+ type = "gpio";
+ gpio = <&gpio 10 0>;
+ value = <0>;
+ };
+ step6 {
+ type = "regulator";
+ id = "panel";
+ disable;
+ };
+ };
+ };
+ };
+
regulators {
compatible = "simple-bus";
#address-cells = <1>;
@@ -549,7 +651,7 @@
enable-active-high;
};
- regulator@3 {
+ vdd_panel_reg: regulator@3 {
compatible = "regulator-fixed";
reg = <3>;
regulator-name = "vdd_pnl";
@@ -559,7 +661,7 @@
enable-active-high;
};
- regulator@4 {
+ vdd_bl_reg: regulator@4 {
compatible = "regulator-fixed";
reg = <4>;
regulator-name = "vdd_bl";
--
1.8.0
--
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